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首页> 外文期刊>Continental Shelf Research: A Companion Journal to Deep-Sea Research and Progress in Oceanography >Time series analyses reveal environmental and fisheries controls on Atlantic horse mackerel (Trachurus trachurus) catch rates
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Time series analyses reveal environmental and fisheries controls on Atlantic horse mackerel (Trachurus trachurus) catch rates

机译：时间序列分析揭示了对大西洋鲭鱼（Trachurus trachurus）捕获率的环境和渔业控制

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摘要

Time-series models (Dynamic factorial analyses and; Min/max autocorrelation factor analysis) were used to explore the relative influences of environmental variables and fishing pressure of trawl, seine and artisanal fleets on catch rates on Trachurus trachurus in ICES IXa sub-divisions (IXaCN-North coast; IXa-CS-South coast; IXaS-Algarve, South coast, Algarve). Fishing effort influenced catch rates in all areas with a 2 year lag and fishing pressure for each area was related to specific fleet sectors effort. In IXaCN, winter upwelling (spawning peak) and both summer northerly wind and wind magnitude (outside of the spawning peak) were strongly correlated with catch rates. In IXaCS summer/autumn westerly winds were related with catch rates. Northerly winds in spring, upwelling and SST (winter and autumn) were related with catch rates in IXaS-Algarve. For species with a long spawning season such as horse mackerel, seasonal analyses at broad regional scales can detract from a better understanding of variability in short term sub-stock catch rates. Favorable environmental conditions, even during seasons with low spawning activity can positively affect catch rates. Ignoring the role of regional oceanographic features on the spatial distribution of the sub-stocks when analysing variability in catch rates can lead to poor inferences about the productivity of the populations. (C) 2015 Elsevier Ltd. All rights reserved.
机译：使用时间序列模型（动态因子分析和;最小/最大自相关因子分析）来研究环境变量以及拖网，围网和个体船队的捕捞压力对ICES IXa分区中chu鱼的捕获率的相对影响（ IXaCN-北海岸; IXa-CS-南海岸; IXaS-阿尔加维，南海岸，阿尔加维）。捕捞努力影响了所有区域的捕捞率，滞后了2年，每个区域的捕捞压力与特定船队部门的努力有关。在IXaCN中，冬季上升流（产卵峰）和夏季北风和风幅（产卵峰之外）都与捕获率密切相关。在IXaCS，夏季/秋季的西风与捕获率有关。春季，上升流和海温（冬季和秋季）的北风与IXaS-阿尔加威的捕获率有关。对于鲭鱼等产卵期长的物种，在广泛的区域范围内进行季节性分析可能会损害对短期次级种群捕捞率变异性的更好理解。有利的环境条件，即使在产卵活动低的季节也可以积极影响捕捞率。在分析捕捞率的变化性时，忽略区域海洋特征对子种群空间分布的作用可能导致对种群生产力的推断不足。 （C）2015 Elsevier Ltd.保留所有权利。

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